You're invited to a fitness shindig with freebies galore.

While your LA editor's 21st birthday was a bit of a blur, Crunch's big two-one promises to be unforgettable. Trading cocktails for mocktails, the gym celebrates its hallmark year this Thursday, July 29, from 6PM to 9PM, with gratis retro-themed workouts.

Enjoy an hour of throwback tunes with a live DJ, along with awesomely '80s exercise. Grab the nostalgic playlist here.

If you can't make it to the party, you can still visit Crunch21's site for a shot at winning 21 personal training sessions today only.

And just for Vital Juicers, sign up now for a weeklong pass plus a free training session. 

How's that for a party favor? 

Friends don't let friends miss out on fitness freebies. Send your pals this deal!